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Neutral rust remover and preparation method thereof

A rust remover and neutral technology, applied in the field of neutral rust remover and its preparation, can solve problems affecting process quality, increased acid consumption, excessive corrosion, etc., and achieve high processing safety and improved production environment

Inactive Publication Date: 2019-05-03
佛山市海明威生态科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Chemical derusting is an important treatment step in the existing metal processing. If the rust is not cleaned, it will seriously affect the quality of the subsequent process and ultimately affect the quality of the product.
[0003] Existing chemical rust removal still mostly adopts strong acid solutions, mainly hydrochloric acid, sulfuric acid, and phosphoric acid. It is a strong acid rust removal, which often leads to excessive corrosion due to inaccurate timing of rust removal, which not only reduces product quality, but also directly increases acid consumption and increases production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A neutral rust remover is characterized in that, by weight percentage, it comprises the following components:

[0030] 72.5% water;

[0031] 20% hydroxyethylidene diphosphonic acid;

[0032] 3% malic acid;

[0033] 2% sodium alginate;

[0034] 1% Polypropylene Alcohol PPG2000;

[0035] 0.5% triethanolamine;

[0036] 0.5% fatty alcohol polyoxyethylene ether;

[0037] 0.5% corrosion inhibitor.

[0038] A kind of preparation method of neutral rust remover as described above, comprises the following steps:

[0039] (1) 70% of the above-mentioned 72.5% water total amount is added in the reactor;

[0040] (2) Add hydroxyethylidene diphosphonic acid with a weight ratio of 20% to the reaction kettle in step 1, and turn on the stirrer to stir until completely dissolved. The stirring temperature of the reaction kettle is 170° C., and the stirring speed is 70 rpm. Then add malic acid with a weight ratio of 3%, stir until completely dissolved, add 2% sodium alginate, stir u...

Embodiment 2

[0044] A neutral rust remover is characterized in that, by weight percentage, it comprises the following components:

[0045] 80% water;

[0046] 15% hydroxyethylidene diphosphonic acid;

[0047] 2% malic acid;

[0048] 1% sodium alginate;

[0049] 1% Polypropylene Alcohol PPG2000;

[0050] 0.3% triethanolamine;

[0051] 0.4% fatty alcohol polyoxyethylene ether;

[0052] 0.3% corrosion inhibitor.

[0053] A kind of preparation method of neutral rust remover as described above, comprises the following steps:

[0054] (1) 65% of the above-mentioned 80% water total amount is added in the reactor;

[0055] (2) Add hydroxyethylidene diphosphonic acid with a weight ratio of 15% to the reaction kettle in step 1, and turn on the stirrer to stir until completely dissolved. The stirring temperature of the reaction kettle is 180° C., and the stirring speed is 60 rpm. Then add malic acid with a weight ratio of 2%, stir until completely dissolved, add 1% sodium alginate, stir until...

Embodiment 3

[0059] A neutral rust remover is characterized in that, by weight percentage, it comprises the following components:

[0060] 85% water;

[0061] 10% hydroxyethylidene diphosphonic acid;

[0062] 2% malic acid;

[0063] 2% sodium alginate;

[0064] 0.5% Polypropylene Alcohol PPG2000;

[0065] 0.2% triethanolamine;

[0066] 0.1% fatty alcohol polyoxyethylene ether;

[0067] 0.2% corrosion inhibitor.

[0068] A kind of preparation method of neutral rust remover as described above, comprises the following steps:

[0069] (1) 60% of the above-mentioned 85% water total amount is added in the reactor;

[0070] (2) Add hydroxyethylidene diphosphonic acid with a weight ratio of 10% to the reaction kettle in step 1, and turn on the stirrer to stir until completely dissolved. The stirring temperature of the reaction kettle is 190° C., and the stirring speed is 50 rpm. Then add malic acid with a weight ratio of 2%, add 2% sodium alginate after stirring until completely dissolved,...

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Abstract

The invention discloses a neutral rust remover and a preparation method thereof. The neutral rust remover comprises the following components by weight: 72-85% of water, 10-20% of hydroxyethylidene diphosphonic acid, 2-3% of malic acid, 1-2% of sodium alginate, 0.5-1% of polyacrylic alcohol PPG2000, 0.1-0.5% of triethanolamine, 0.1-0.5% of fatty alcohol polyoxyethylene ether, and 0.1-0.5% of a corrosion inhibitor. The product prepared by the method has a near-neutral pH value under working conditions, the damage to the human body is negligible even in direct contact, no bubble is generated during work, and no acid mist is generated, so that the production environment is greatly improved; and the neutral rust remover only acts on the surface rust of the workpiece without corroding the iron substrate, no excessive corrosion exists, the processing size is not influenced, and the processing safety is high.

Description

technical field [0001] The present invention relates to a rust remover, in particular to a neutral rust remover and a preparation method thereof. Background technique [0002] Most of the existing metal processing has chemical derusting as an important treatment step. Unclear rust treatment will seriously affect the quality of subsequent processes and ultimately affect product quality. [0003] Existing chemical rust removal still mostly adopts strong acid solutions, mainly hydrochloric acid, sulfuric acid, and phosphoric acid. It is strong acid derusting, which often leads to excessive corrosion due to inaccurate derusting time, which not only reduces product quality, but also directly increases acid consumption and increases production costs. Contents of the invention [0004] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a neutral rust remover and a preparation method thereof, so as to overcome the deficienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/26
Inventor 刘兵
Owner 佛山市海明威生态科技股份有限公司
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